1. Go to your email inbox
2. Find the email with subject "Just more thing before you can get Peter's ESP32 notes: Please confirm your subscription". This email comes from [email protected]
3. Open this email and click the link inside.
This will confirm your email address, and can then your download can begin.
The confirmation email should only take up to 2 minutes to arrive.
(Please check in your spam folder, just in case.)